Add MemcachedTool.

This tools offers a dictionnary interface to memcached.
As it depends on python-memcached and should not fail silently if the site administrator does not have this python module, this tool is disabled by default.
You can enable it runing "touch Products/ERP5Type/USE_MEMCACHED_TOOL"


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@11618 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/__init__.py

@@ -50,13 +50,17 @@ import Products.Localizer # So that we make sure Globals.get_request is availabl
 # read permissions for zope - this prevents security holes in 
 # production environment  
 class_tool_security_path = '%s%s%s' % (product_path, os.sep, 'ALLOW_CLASS_TOOL')
+memcached_tool_enable_path = '%s%s%s' % (product_path, os.sep, 'USE_MEMCACHED_TOOL')
 
 def allowClassTool():
   return os.access(class_tool_security_path, os.F_OK)
-  
+
+def allowMemcachedTool():
+  return os.access(memcached_tool_enable_path, os.F_OK)
+
 def initialize( context ):
   # Import Product Components
-  from Tool import ClassTool, CacheTool
+  from Tool import ClassTool, CacheTool, MemcachedTool
   import Document
   import Base, XMLObject
   from ERP5Type import ERP5TypeInformation
@@ -65,7 +69,8 @@ def initialize( context ):
   content_constructors = ()
   content_classes = ( Base.Base, XMLObject.XMLObject, )
   portal_tools = ( ClassTool.ClassTool,
-                   CacheTool.CacheTool, )
+                   CacheTool.CacheTool,
+                   MemcachedTool.MemcachedTool, )
   # Do initialization step
   initializeProduct(context, this_module, globals(),
                          document_module = Document,

product/ERP5Type/dtml/memcached_tool_configure.dtml

+<dtml-var manage_page_header>
+<dtml-var manage_tabs>
+
+<h3>Memcached server configuration</h3>
+<p>
+Memcached Tool provides the programer with an interface to a memcached server.
+This interface is similar to a dictionnary.
+The server to connet to can be configured below.
+Programer can get an interface in his scripts using :
+</p>
+<pre>portal_memcached.getMemcachedDict(key_prefix=something)</pre>
+<p>
+<i>something</i> : Must be a string uniquely identifying the usage of memcached, similar to <i>CachingMethod</i>'s id parameter. This allows multiple memcached users to share the same connection to the same memcached server without overwriting other's values.
+</p>
+<form action="setServerAddress" method="POST">
+  <input type="text" name="value" value="<dtml-var expr="context.getServerAddress()">">
+  <br/>
+  <input type="submit" value="Update server address"/>
+</form>
+
+<dtml-var manage_page_footer>